Developing art critique platform and would appreciate advice on something

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We took a lot of feedback on various aspects and the one thing that kept coming up was that people wanted to know the competence of the person who gives the critique. What would be the best way to evaluate a user's skill level?
1. Base it purely on the quality of the user's critiques
2. Users can apply for a competence test based on a drawing they submit and get a rating from 10 semi random users
3. Something else. I would appreciate suggestions if you choose this.